Python : using function

Question

how I can make function in program like IDLE or linux terminal? and how I can use loop? when I am trying to use it that happen:

>>>for i in numbers:  # when i am push enter its make ... 
...    print packet[i]  # when i am pushing on the enter its create new line

you just need to press enter again to execute your for loop - try for i in range(10): print i to give you a flavour. — srowland
– srowland, Commented Mar 21, 2016 at 20:50

srowland · Accepted Answer · 2016-03-21 20:56:51Z

1

A function is defined like this:

def my_func(arg_one):
    return arg_one * 2

print my_func(2)

4

I thoroughly recommend the Python tutorial here as a great place to get started learning Python.

And you can simulate a loop in your interpreter like this:

>>> for i in range(5): # press enter
...    print i         # press enter again
...                    # press enter again
...
0
1
2
3
4
>>>

Note the use of # which is the proper way to start a line comment in Python too.

answered Mar 21, 2016 at 20:56

srowland

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3 Comments

ariel20 Over a year ago

if my line is very long how can I continue it in under line?

srowland Over a year ago

this is a new question really ... however, you can use the `\` character at the end of a line to carry it onto the next line :)

Terry Jan Reedy Over a year ago

@ariel20: I second the suggestion to start through the tutorial. All the questions you have asked are explained there. That is how I started 19 years ago.

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